$(function () {

 var starttime = transdate("2014-09-30 15:53:00");

 var endtime = transdate("2014-10-03 15:53:00");

      

 var now = "'"+new Date().getTime()+"'";

 var nowtime = now.substr(1,10);

      

 if(nowtime > endtime){

  $('.meeting_time').html('展会已结束');

 }else if(nowtime < starttime){

  var day = get_date_different(nowtime,starttime);

  $('.meeting_time').html('距展会開始还有'+day+'天');

 }else{

  $('.meeting_time').html('展会进行中');

 }

});

function get_(www.111cn.net)date_different(date_1,date_2){

 var days= date_2 - date_1; 

 var time = parseInt(days / (60 * 60 * 24)); 

 return time;

} 

function transdate(endTime){

 var date=new Date();

 date.setFullYear(endTime.substring(0,4));

 date.setMonth(endTime.substring(5,7)-1);

 date.setDate(endTime.substring(8,10));

 date.setHours(endTime.substring(11,13));

 date.setMinutes(endTime.substring(14,16));

 date.setSeconds(endTime.substring(17,19));

 return Date.parse(date)/1000;

}from:http://www.111cn.net/wy/js-ajax/66437.htm